Because she has reigned for 60 years now.
The Jubilee
The Queen has had the throne for fifty years, so there is a celebration.
The Diamond Jubilee celebrates the 60th anniversary of being a queen.
The diamond jubilee is a grand celebration of her 60 years on the throne.
Queen Victoria celebrated the Golden Jubilee in 1887. The Golden Jubilee was the celebration that marked the 50 years the Queen had been on the throne.
It was a celebration of Queen Elizabeth's 60 years as the United Kingdom's monarch.
It is the celebration of the Queen having been on the throne for sixty years, having been crowned in 1962.
Queen Victoria ascended the throne in 1837. * 1862 was her Silver Jubilee year (25 years). * 1887 was her Golden Jubilee year (50 years). * 1897 was her Diamond Jubilee year (60 years).
In UK in 1977 the Queen celebrated Silver Jubilee (1952 + 25)
The tower encasing Big Ben was renamed as 'Elizabeth Tower' in celebration of the Queen's diamond jubilee.
Its a celebration of an extended amount of time that a monarch has been on the throne. Somewhere from 60-75 years Queen Elizabeth II has recently celebrated her Jubilee for 60 years on the throne of the United Kingdom
That is the correct spelling of "jubilee" (a celebration, especially on an anniversary).